Trimeresurus medoensis, commonly named the Motuo bamboo pitviper, is a venomous pitviper species endemic to India, Burma, and Tibet. No subspecies are currently recognized.
Maximum total length for males is ; for females, . Maximum tail length for males is ; for females, .
The hemipenes are short, thick, and spinose.
Scalation: dorsal scales in 17 longitudinal rows at midbody, of which rows 7-11 are slightly keeled. There are 8 upper labials, of which the first are separated from the nasal scales by a distinct suture. The ventrals number less than 150.
Color pattern: green or bluish green above, yellowish white below, the two separated by a bright bicolored red (below) and white (above) ventrolateral stripe (in both males and females), which occupies the whole of the outermost scale row and a portion of the second row.
Found in North-Eastern India; northern Burma (Myanmar); and southeastern Xizang (Tibet), China. The type locality listed is "near A-ni Bridge, Medo Xian, Xizang [Tibet], alt. 1,200 m [3,900 ft]" [Autonomous Region, China].